Astronomy The Solar System
Physics & Astronomy
Quiz 7 :
The Formation of Planetary Systems
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Q18 Q18 Q18
If an interstellar cloud having a diameter of 1016 m and a rotation period of 1 million years were to collapse to form a sphere that had the diameter of our Solar System (approximately 40 AU), what would its rotation period be? Assume the cloud's total mass and angular momentum did not change.
Q19 Q19 Q19
Consider a small parcel of gas in the cloud out of which the Sun formed that initially was located in the accretion disk at a distance of 10 AU from the Sun and rotating around it with a speed of 10 km/s.If this parcel of gas eventually found its way to a distance of 1 AU from the Sun without changing its orbital angular momentum, what would be its new rotation speed?
Q90 Q90 Q90
Approximately how massive are most of the extrasolar planets that have been discovered using the Doppler effect, and which planet in our Solar System is similar in mass? Why is the Doppler effect method more likely to find massive (rather than low-mass) planets and planets that are close to their stars?